Pantograph engraving or like machine



' April 30, 1940. KAPP ET'AL 2,199,251

PANTOGRAPH ENGRAVING 0R LIKE mcamn Filed Sept. 24, 1938 3 sheetsksheet 3 lNVENIORS. GENE KAPR ATTORNEY.

- Patented Apr. 30, 1940 Gene Kapp and Norbert Sehimmel, New York, N. Y., assignors to New Hermes, Inc., New York, N. Y., a. corporation of New York Application September 24, 19 38, Serial No. 231,454

14 Claims.

indicia, said means being swingably supported on the pantograph leverage and being preferably 15 movable With respect to the workholder carrying a the object to be worked upon.

Still another object of the present invention is to provide means for resiliently urging said reproducing means against the said leverage. m A further object of the present invention is to connect the stylus for the indicia and the engraving or. like means with respect to the pantograph' leverage such that the stylus and said means are swingable in planes perpendicular to that of said leverage.

Still another object of the invention resides in the provision of indicia reproducing means which are guidingly and swingably arranged at the 'pantograph leverage and which are-relatively a movable to spring supported clamping means for holding in position'the object to be worked upon. The present invention further contemplates the provision of indicia reproducing means which may be selectively actuated during the operation of 1 a the stylus.

A further object of the invention is to provide a horizontally and rotatably movable pantograph leverage whilst both said indicia reproducing means and said clamping means of the workholder are movable substantially in a perpendicular plane and in opposite directions with respect to each other.

A further object of the presentinvention is to provide adjustable means for varying the size.

45 and/or style of the reproduction of the indicia.

Other objects will be in part apparent, and in part pointed out hereinafter.

Accordingly, the invention consists in the fea- -tures of construction, combination of elements 50 and arrangements of parts, all as ,will be illus-- tratively set forth in the following description.

and the scope of the application of which will be indicated in the appended claims.

In tLe accompanying drawings, in which is is shown one of the various possible embodiments of the invention, and in which like numerals represent like parts:

Fig. 1 is a top plan view of an engraving device incorporating the invention.

Fig. 2 is a side elevation of the device shown in 5 Fig. 1. Fig. 3 is a longitudinal sectional view of the needle holding arm and adjacent parts on an enlarged scale.

Figs. 4 to 6 are diagrammatic views, showing difierent positions of the engraving or like too] with respectto the "pantograph leverage and the pivot thereof.

Figs. 7 and 8 are diagrammatic views showing still other positions of the tool with respect to the pantograph leverage and the pivot thereof.

Referring now to the drawings, numeral l0 designates a base upon which 'the' motor I] is mounted. The motor I lis provided with a pulley [2 over which is trained preferably a spring belt 0 l3, the latter further being trained over p'ulley l4, fixed ,to a hollow shaft provided at the arm l6 of the machine. Adjacent the said motor ii, there is located a swingable lever I! which is pivotally and resiliently attached at one of its 25 endsto a post l8 at I 9 and which carries at its other end a shaft 20. This shaft supports two adjacently arranged pulleys 2|, 22 over which the said spring belt I! is guided. This arrangement consequently provides a uniformly tensioned- 80 belt-organization; the belt l3 being rotatably guided over pulleys l2--2lI4 --22 and back to pulley I2 of the motor ll. I

On base "I, there is fixedly arranged a vertical post 23 on which is rotatably mounted the sleeve 35 24. Attached to sleeve 24 is a horizontal arm 25.

In spaceda'part parallel relation with arm 25 is another arm or lever 26, there being a strap 21 pivotally connecting both of said arms 25, 26, the said strap 21 being detachably secured thereto-by 40 means of threaded elements 28. Pivotally connected at the-free ends 29 and 30 of the respective arms 25, 26 by means of screws 3 isa secondstrap 3| to which is pivotally linked the lever 32. I This pivotal effect isbrought about by means of the pins 33, 33'. At the free 'end of lever 32, there isprovided the upper end of the stylus 35. In 7 the-path of the pointed end 31 of the stylus 35 is a support 38 upon which may be adjustably and removably positioned a plate, strip or sheet 39 carrying the indicia 40 to be reproduced. Support 38 is arranged on base ll in any suitable manner. Slidably arranged on the support 28 are clamping members ll with engaging members desired position.

Arm 43 is pivotally connected for vertical swinging movement at 44 to arm l5. The aforementioned arms 25, are detachably secured to arm 43 by means of the screws 45, 45. One end of arm 43 carries a guide pin 47 received in the upper coils of a spring 48, the lower portion of said spring being inserted in a socket 43 formed within the upset-portion 58 of arm I5. The other end of arm 43 is arranged to ride between stops 5|, 52 by a tongue and groove arrangement 53, 53' provided respectively in the raised hollow or sleeved portion 54 of arm l5 and on arm 43.

Within portion 54, there is a bushing 55 having an extended threaded end 55 threadedly receiving a cap 51 thereon. Within bushing 55 are thrust bearings 58 which abut against the hollow shaft l5 and alsoagainst the wall of bushing 55. ,Bearings 58 are maintained in position by shoulders 58 of shaft l5. Partially within and projecting from bushing 55 is the hollo end piece 55 for housing the iower extension iii of shaft l5 and also the lower end of engraving needle 52, the latter passing through and protruding from the said hollow shaft l5. Needle 52 has a head 53 and a threaded portion 54 which threadedly engages the extension 55 of the shaft l5, the extension 55 being externally threaded for engagement of pulley i4. End piece 55 has a shoulder 55 which abuts against the bushing 55. Bushing 55 may be held in position by a set screw 51 located in the recess 58 of the sleeved portion 54 of arm l5. Extending from portion 54 is a pin 59 carrying at its upper end a knob 10 to-be contacted by a finger or thumb of the hand of'the operator for depressing said arm I5. Needle 52 is removed by unthreadirg the same at 54 from the hollow shaft l5. To dismantle for repair-or other purposes pulley I4 is unthreaded from shaft l5. Cap 51 may then be removed from bushing 55 so as to enable the withdrawal of hollow shaft l5 when desired.

On base l0 and within the reach of the needle 52, there is provided a workholder 1|. Workholder II is substantially comprised of U-shaped stands I2, each having a pair ofposts 12 and the ciamping device .13. Clamping device I3 is resiliently supported by coil springs 15 and guided by' vertical pins 15 slidable in sleeves 15' of said base In. Clamping device 13 provides a swingable lever TI, which is pivoted at 14 and connects with preferably grooved bars 18, the said bars being urged upwardly by the springs 15. Bridged across opposite posts 12 of the stands I2 are the connecting rods I9 forming slideways for the transverse members 85; These members 88 may be adjusted to any convenient position on. said rods 19. It is to be observed, thatthe transverse members are located above and spaced from the bars 15 to enable the clamping therebetween of an article, such as a vanity case 8| made ofv metalwith or without an enamel surface, indicated in dotted lines, for the engraving or like working operation.

v In order to perform the engraving or like operation, the interchangeable indicia or indicia parts are placed on support 38 and positioned on 48 by means of screws 4| and plates 42.

Motor II is then switched on by means of switch S. v

The article to be worked upon is clamped in position between the cross-members. 85 and clamping bars 13. This is efiected by depressing knob 85 of lever 11. The lever 11 has a pin 9| action of said- 42 for holding the indicia carrying plate 38 in on either side, which pin rides in a slot 82 formed in each depending lug 83 on each bar 18. Depressing lever 11 causes the pins 15 to lower within guiding sleeves 15 against the action of springs I5. After the article to be worked upon is placed in position on bars 18, lever 11 is released and the article is maintained in clamped position presenting the surface to be worked upon.

The stylus is gripped by the K5718 of the operator, which may be guided in suitable manner. The tool holder arm I5 is moved down wardly by depressing on knob 18 until the point of the tool 52 bears against the article to be worked upon. Tool 52, as heretofore stated, is rotated at high speed and is made to follow by means of the pantograph leverage the movement or worked portion on the article is assured by the particular arrangement, heretofore described,

and including the end piece 58, which forms an abutment against the surface of the article while the tool is in cutting or like operation.

The size and/or style of the indicia or parts thereof; may be varied in the following manner:

A plurality of perforations 82, 84, 83, 85 and 85 are provided in lever 43. Arm 25, which is horizontally movable about pivot post 23, is also provided with a plurality of apertures 81, 88 and 88. Corresponding apertures 81', 88' and 88' are provided on lever arm 25.

Referring now to the diagrams, shown in Figs. 4 to 6, in order to obtain a true reproduction of the indicia to be copied, the distance R between pivot 23 and the articulated point 83 must be equal'to the distance R between the latter point Figs. 4, 5 and tween the articulated point 84 and the axial tool center 53 is such that the distance Y is less than the distance'between the point 83 and pivot 23 (illustrated in Fig. 4), thus obtaining a reproduction of the letter B in a different style, i. e. in a more oblique form. For instance, when the arrangement, shown in Fig. 4 .is provided, the tool accurately reproduces the outline followed by the stylus of the indicia or signature to be copied, and when the arrangements, shown in Figs. 7 and 8 are provided, the said outline is reproduced in different styles and sizes respectively. It is to be noted, that in the arrangements shown in Figs. 4, 7 and 8, the height of the letter B is the same. This is, because the distance between pivot 23 and the respective points 83, 84, 82 remains the same. The width of the letter B, however, as well as its slant (shown in Figs. '7 and 8) diifers. because of the differing leverage of the pantograph due to the variation in distancesbetween I ll of the stylus 35. Uniform depth of the engraved the axis of tool 53 and the respective fulcrum means to swing and adjust the member carrying the indicia with respect to the stylus.

Although we have described the improvements of the invention in a certain form, .we do not desire to be limited to such details since many changes and modifications may be made without departingir'om the scope 01 this invention.

Having-thus described our invention, what is claimed as new and desired to secure by Letters Patent is:

' 1. An engraving or copyingmachine tor'reproducing indicia and having a pantograph' leverage with a stylus for following said indicia;

tive movement of said means toward said work holder. 3. An engraving or copying machine for reproducing indicia and having a pantograph leverage with a stylus for following said indicia; comprising a work holder, a lever, and means. for reproducing said indicia, sa'id reproducing means being supported by said lever, said lever being resiliently and swingably connected to said leverage for relative movement of 'said means 1 towardsaid work holder.

4. An engraving or copying machine for reproducing indicia and having a pantograph leverage with a stylus for .following said indicia;

comprising a work holder, a lever, means for reproducing said indicia, said reproducing means being supported by said lever, said lever being provided with a slideway for guidingly receiving therein an end oi. a portion of said leverage and a pivot swingably connecting said reproducing means through saidlever to said portion, and

spring means at the free ends-of said lever and said portion to resiliently engage said lever and said portion, whereby a relative movement of said I reproducing means toward said work holder is obtained.

5. An engraving or copying machine for reproducing indicia and having a pantograph lever-, age with a stylus for following said indicia; comprising a workholder, a lever, means for reproducing said indicia, said reproducing means being supported by said lever, said lever having a slideway for guidingly receiving therein an end oi a portion of said'leverage, and a pivot for swin ably connecting said reproducing means through said lever to said portion, and spring means at the free ends 0! said lever and said" portion to resiliently engage said lever and said portion, said workholder including clamping means resiliently supported thereat, whereby a relative movement of saidreproducing means toward said work- .holder in a substantiallyperpendicular pianeis obtained.

6. An engraving or copying machine for reproducing indicia and having a pantograph leverage with a stylus for following said indicia; comprising ,a workholder, an arm, means for reproducing said indicia, said reproducing means being supported by said am. said arm a :of said leverage, a slideway on said arm for guidarm, whereby a relative movement of said reprotio of said leverage, means for relatively adiusting slldeway for guidingly receiving therein an end of a portion of said leverage, and a pivot for swingably connecting said reproducing means through said arm to said portion, and resilient means between said arm and said portion, said workholder including clamping means resiliently supported thereat, whereby a relative movement of said reproducing means toward said workholder in a substantially perpendicular plane and in opposite direction is obtained. l0

7. An engraving or copying machine for reproducing indicia and having a pantog'raph leverage with a stylus for following said indicia; comprising a workholder, clamping means resiliently connected to said workholder and movable in a substantially. vertical plane, an arm, means for reproducing said indicia,'said reproducing means being'connected with said arm, said arm being swingably and resiliently supported on a portion ingly receiving therein an end of said portion of said leverage, and stops relatively positioned with respect to said slideway and said end of said portion for limiting the swinging movement 01' said ducingmeans toward said workholder in a substantially perpendicular plane and in opposite direction is obtained.

8. An-engraving or copying, machine for reproducing indicia and having a pantograph leverage with a stylus 'for following said indicia; comprising a workholder, clamping means resilientlyconnected to said workholder and movable .in a substantially vertical plane, an arm, means for reproducing said indicia. said reproducing means being connected with said arm said am being swingably and resiliently supported on a portion-of said leverage, a slideway on said arm for guidingly receiving therein an end of said porsaid portion of said leverage thereati and stops relatively positioned with respect to said slideway and said end of said portion for receiving the swinging movement of said arm, whereby a relative movement of said reproducing means toward saidworkholder in a substantially perpendicular plane and in opposite direction is obtained.

9. An engraving or copying machine for reproducing indicia and having a pantograph mechanism with a stylus ior following-said indicia; comprising a workholder, a lever forming part 0! said mechanism,'an arm for carrying means for reproducing said indicia, said lever and said arm being linked together and maintained in spaced apart relation, and adjustable means connecting said lever to said mechanism, said lever with said mechanism being iournaled on a pivot for horizontal movement, said am and said NW ducing means being swingably movable in a'substantially vertical plane toward and from said U workholder.

10. An engraving or copying machine for reproducing indicia and having a pantograph mechanisni with a stylus for iollowing'said indicia; comprising a base, a workholder-on said base, saidworkholder including a portion cooperabie therepivot for horizontal movement, said arm and said reproducing means being swingably movable in a substantially vertical plane toward and from said workholder.

11. An engraving or copying machine for reproducing indicia and having a pantograph leverage with a stylus for following said indicia; comprising a workholder, and means for reproducing said indicia, said workholder including clamping means resiliently and guidingly arranged with respect to the remainder of said workholder, said clamping means and said reproducing means being relatively movable in a substantially perpendicular plane toward each other.

12. An engraving or copying machine for. reproducing indicia and having a pantograph leverage with a stylus for following said indicia; comprising a base, a workholder on said base, and an engraving tool for reproducing said indicia connected to said leverage, said workholder including clamping means provided with a lever projecting therefrom and beyond the remainder of said workholder, said clamping means being re-' siliently connected to said base and being guidingly movable with respect to the remainder of said workholder and relatively to said tool, said lever being operable from without said remainder of said workholder.

13. An engraving or copying machine for reproducing indicia and having a pantograph leverage with a stylus for following said indicia; comprising a workholder, and an engraving tool for reproducing said indicia connected to said leverage, said tool being resiliently held in one position and swingable in an arcuate path toward said workholder into another position, said workholder including clamping means, said clamping means being resiliently and guidingly disposed relatively to the remainder of said workholder.

14. An engraving or copying machine for re- 

